; Lens_TEMTO - Enable & perfect your technologies!
    


Home > Products > Optical Products > Lenses > Lens
Lens

 
 

Lenses have many applications in range from the simple collection of the scanning of laser beams to precise imaging and image transferring. Lenses are classified as singlet, cylindrical, achromatic and ball lens according to the differentapplications.

Selecting the proper lens for your application requires making a number of choices. A few of the many considerations include: lens shape, conjugate ratio, f/number, transmission, wavefront distortion, scattered light, anti-reflection coating, and cost.


Featured Material:
For application in the visible and infrared up to about 2.1 m, BK7 offers excellent performance at a good value. In the ultraviolet down to 195 nm, UV Fused Silica is a good choice. UV Fused Silica also has excellent transmission in the visible and infrared up to about 2.1 m, better homogeneity, and a lower coefficient of thermal expansion than BK7. CaF2 and MgF2 offer high transmission in the deep UV, and they are excellent choices for deep UV excimer laser or infrared applications. Silicon and Germanium lenses are widely used in IR applications.

Material

Transmission Range

Cost

Features

BK7

0.390~2.100nm

Low

High transmission for visible to near infrared applications, the most common optical glass.

UV Fused Silica

0.160~2.100um

Moderate

Excellent homogeneity and low thermal expansion, high laser damage resistance.

CaF2

0.150~9.000um

High

High transmission for deep UV to infrared applications.

CZ Silicon

0.120~100.0um

Moderate

High thermal conductivity and low density, excellent for infrared applications.

Germanium

1.900~17.00um

High

Excellent for infrared applications


Optical Surfaces Requirements:
The lens application drives the requirements for surface irregularity and surface quality.

Surface Irregularity

Figure

Cost

Applications

/2

Low

Used where wavefront distortion is not as important as cost

/4

Moderate

Excellent for most general laser and imaging applications where low wavefront performance must be balanced with cost

/8

High

For laser and imaging applications requiring low wavefront distortion, especially in systems with multiple elements

Surface Quality

Scratch-Dig

Cost

Applications

60-40

Low

Used for low power laser and imaging applications where scattered light is not as critical as cost

40-20

Moderate

Excellent for laser and imaging systems with focused beams that can tolerate little scattered light

20-10

High

For demanding laser and imaging systems where minimizing scattered light is critical


Antireflective Coatings:
We offer an extensive range of antireflective coatings covering the ultraviolet, visible, near infrared, and infrared regions. Please refer to our coatings chapter.

Lenses are the most regular components that TEMTO is making. We can reach very high quality but low price, and we can be competitive for any suppliers in the world. TEMTO processes thousands of radius Testing Plate for fabricating lenses in stock.


Manufacturing Tolerances:
Tolerances
Commercial quality
Precision quality
Manufacturing limits
Glass Quality
nd
0.001
0.0005
Melt controlled
vd
0.8%
0.3%
Melt controlled
Diameter(mm)
+0.00/-0.10
+0.00/-0.05
+0.00/-0.01
Center Thickness(mm)
0.10
0.02
0.005

SAG (mm)

0.050

0.025

0.010

Radius

2%

0.5%

0.025%

EFL

2%

1.0%

0.1%

Scratch-Dig
80-50
40-20
10-5
Power (fringe)
8
3
1
Irregularity (fringe)
3
0.5
0.2
Wedge Lens (ETD, mm)
0.05
0.01
Facility controlled
Bevel
<0.25mm x 45or upon requirement
No bevel
Coating
Upon requirement
Note: The general tolerance specifications above provide a guideline regarding manufacturing capabilities for optics ranging in size from 0.6-500mm. The manufacturing limits are not absolute; tighter tolerances may be possible. Part specific tolerances may vary depending on component size, shape, and/or material.

Copyright © 2004-2018 TEMTO Technology Co., Ltd, TEMTO®, All rights reserved. ICP05004887
Tel: +86-591-8787-0640  Fax: +86-591-8787-0641  E-mail: sales@temto.com  http://www.temto.com